Adjustable clamp



M. L. RADTKE.

ADJUSTABLE CLAMP.

APPLICATION man JUNE 16. I919.

1,35 1,966, PatentedSept. 7, 1920.

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MILTON L. RADTKE, 013 DETROIT, MICHIGAN.

ADJUSTABLE CLAMP.

Application filed June 16, 1919.

To all whom it may concern Be it known that I, MILTON L. RADTKE, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented a new and useful Adjustable Clamp, of which the following is a specification.

This invention relates to adjustable clamps and is particularly applicable for use in assembling the brake bands which are employed in certain types of planetary transmission gearings.

The object of the invention is to provide a means for temporarily clamping the several brake bands in proper registering relation so as to facilitate assembly or" the transmission, and it is a further object to yieldably space the opposed members or the clamp so that the device may be readily engaged with all of the clamping bands despite possible variations in the alinement oi": the lugsv upon the bands, which lugs the novel clamp is adapted to embrace.

in attaining these objects the invention contemplates a clamp comprising a pair of bars adjustably spaced by springs mounted upon a pair of bolts connecting correspond ing ends of said bars, the spacing of the bars being such as to permit them to snugly embrace the pairs of lugs carried by the free ends of the brake bands.

A preferred embodiment of the invention is disclosed in the accompanying drawing, wherein,

Figure l is a top view of the clamp engaged with the brake bands of a transmission.

Fig. 2 is a similar view of the invention per se, showing in section the ends of the clamp bars engaged by the bolts.

in these views, the reference character 1 designates the brake bands of a planetary transmission (not shown) and 2 the drawrods controlling said bands. is effected through engagement of each rod with a pair of lugs 3, mounted in opposed relation upon the extremities o1 the controlled band. Between each pair of lugs a spring at is coiled upon the corresponding rod 2, urging the lugs and consequently the ends of the band apart.

The parts above described are old and are disclosed merely to show the application or" the present invention thereto. Said invention comprises a pair of substantially Specification of Letters Patent.

This control Patented Sept. "2, 12:30.

Serial No. 304,696.

parallel offset clamping bars 5 spaced a proper distance to snugly embrace at their :t'ree ends the pairs of lugs 8, between the bands 1 and recs 2. At one end of the clamp the bars 5 are connected by a pair of bolts 6 threaded into one of the bars and passing loosely through oversize apertures 7 in the other. Adjacent their ends thus connected the bars are offset outwardly as inclicated at 8, so that the main portions of the bars are spaced to a somewhat greater extent than their connected ends. At their free ends the opposing faces of the bars are inwardly beveled slightly, as indicated at 9, to facili tate engagement of the bars with the lugs 3.

When the lugs have been embraced between the bars 5, as described and shown, said lugs are positively maintained in the registering relation which it is desirable to maintain in order to properly assemble the transmission oi which the bands 1 form a part. The bolts 6 may be adjusted to establish such a spaced relation between the bars as most suitable for the particular nission which is to be assembled. The

tra loose engagement of the bolts within the a ertures 7 allows a limited angular play tween the bars under the influence of the was and provides for yieldable move to accommodate variations in the spacing of the several pairs of lugs. The shoulders formed by the offsets 8 limit the advance oi the bars 5 into engagement with lugs 3, or in case the several pair of lugs are successively inserted between the bars 5, said shoulders determine the proper position for the first pair of lugs so inserted. When the bral: bands have been properly positioned in the transmission, the clamp may be removed.

A considerable saving of time may be effected by employing the above described clamp and proper positionino' all three bands simultaneously, instead or separately manipulating each band in the practice heretofore followed.

V] hat I claim is:

1. An adjustable clamp comprising a pair of clamping bars, and a plurality of bolts connecting corresponding end portions of said bars, said bolts being threaded into one of the bars and passing through oversize apertures i; tne other.

2. an adjustable clamp comprising a pair of clamping bars, a plurality of bolts connecting corresponding end portions of said bars, said bolts being threaded into one of the bars and passing through oversize apertures in the other and a spring coiled upon one of said bolts and urging said bars apart. V

3. An adjustable clamp comprising a pair of clamping bars and a plurality of bolts connecting corresponding end portions of said bars, said bolts being threaded into one of the bars and passing through oversize apertures in the other, said bars being offset adjacent their connected ends to form tween said bars.

4. An adjustable clamp comprising a pair of spaced clamping bars members connectng corresponding end portions of the bars rigidly engaging one of the same and passin loosely through the other, and means yieldably urging the connected ends of the bars apart.

In testimony whereof I sign this specification.

MILTON L. RADTKE. 

